Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eabbeac66b0647ba0d270512cf9551fa4b4392fa7f8bfc098232e490c48f9300' 
  AND token = 'uQVW6o9+IKYfKaZN7z9/yJgat2RfYCFdeaDrVqBz7N4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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