Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42bfcc0b2e60a837005524e37e971fb719aa3c7eb2882b31ff1fa630b05fc619' 
  AND token = '0LHmH0SAeDvyI9BJETAKiv1rgCLargj7pIC6u2j8chk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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