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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed0aef6684e7bdabad3d9947c3f2ad412af0ccb4b10982ab0478f13033275e89' 
  AND token = 'aPJiX1wQ3AK1mbsDZI1Zj847aF4JUoDdN/7aeDNGbjU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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