Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eac8d6f2783751b81954b6cab94f7088e574fc735350de2f84be32bf2959aa0d' 
  AND token = 'p4cLoXJKwtWdmrFIRW6OrJ9LLMOE6bzbRKGJdnq5omw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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