Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '481311d02184057ad6bafee5fd5fbaa9ab310ef54910ab477d9879fcff82f15d' 
  AND token = 'ivcvENs5eBUUDYj3d2fkW8iyciUcp92uGryrZPRnibk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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