Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '764a4ab5ba019b0b9b46f964ddbfe66a17c5b512d195949a33d0a2e0a2009a07' 
  AND token = 'p4KYpNwKK3rKi95YdvDHHXOwrNgOcsck2qr6YZwGs4U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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