Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f471c54942cc174083aa2e8eb3f74e504f3e466370aac1df8921530745a39b0b' 
  AND token = 'yXcp6EigkV2ueLPc3rbS6YUUd2g+6SMNVsWvp8d8n5g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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