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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a05008c45906b7e48208b415a69815a719de380463814fe40beb0767fb20f073' 
  AND token = 'P93At5VJ7RBtoR4xaz7/7FH9YvQG+R94B2qVae9+OA4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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