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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b91973b8d7bd5b0c608218b21388f8b6df4bdef861d5fc0cafe79a7481044ec1' 
  AND token = 'pNIIa+MGUoI2qcAJelsI5Xx7PEae2V9i5QVHq9hZXE4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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