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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aac75ac13996b1aad6a5aa0f29ebffbe610ad13002d9b4505356a0e47e60f362' 
  AND token = 'ISHobbMRtyvo8XgR2TueYZU3EoWFlkWS3ZKdWAqultc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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