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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f72bf8e6fe8af0bc71cb1e4331ec44655d204123b72625d3912c141251efc495' 
  AND token = 'p1FtTnu7e51HsTIS4GGvhv5J7VZ0vx5fnQ3OkbGbBjo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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