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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a00ede00c009efb6861ac464b49b9f6ec397a6c1e25dc485c5138bcfbe6f7d5' 
  AND token = '05q87nBz5i6ThA3sh+QueKpcNRdJr/P6sYYr2TyzP5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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