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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '662a5f5fc8d275300b32c098a5bca0dc183f6898e3ed7df3ef501f99582c2d5a' 
  AND token = 'pUqlO2eGfDBzLhAB+13POjUw0rRmBLwqp7cneWzw8HA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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