Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb56b5007db9cca40d36a8f07a3c7b631a1d96c2335592ed761cd6d2e74725c7' 
  AND token = '7YXCpDsQ4qv+PXSeBiK40uFYcUoFpUPhxsahYIYvCR8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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