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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ae140764bc3bbd6ca7c81bf4f07ce043682cfa95114a3c4a307d56b1db9bf4b' 
  AND token = 'WL/1AoADiAwKk3R0wqXbUvOz5uirGnMMF6v0bnKKsio=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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