Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1709de3b4413690f79b5dfad7bf121302e6a427d439ffe8046a39019f0c4d21' 
  AND token = '1RI118MeUmv/5Z6Sm830prsrQ43GTSCekxaVGfaTtIY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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