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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '675c5fd7c838e176c65aad248e1e431cdf841f63809db5e5c3005088f07bc69e' 
  AND token = 'J+WgH1m8ukVVaNZDyEnOWQ1uNxhEyZZO3vK0316SJ/Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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