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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ce07c3773ff8b81ad3b5ed291eababcc8bca599415845995d0bb57f28b457f9e' 
  AND token = 'fFuOt4MfBkaalswJwKDtznruMmIaJyHlaM6LnX4c5iQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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