Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29f3c2524c118d0117537c8736601cbc68e4008a6c2066ee61ad365d2c97087a' 
  AND token = 'yCGj2uIRUmioowP7NSpQyxFCIeGOA2q9RDI2bWdyufo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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