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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95133f306afb9f8c53dd97047763b3782b09c2b4b8c20128df1c66ce80e9de82' 
  AND token = 'Ad/slqA3n3yv93jo0CaaoJ4ofpNcupPVsxB9x+Rkk6g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}