Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fc66881a0e683db035c55dca1b45649107bfed9530ca11b9274345ae6f388eb' 
  AND token = '633FTWSi3TuOV6W6CHgvkeHy93E6odplB1BVYR6TNdM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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