Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01bb0fcb2c5371459942e9f02a6e78ca19a86edb83ce7db7fad885b637adc003' 
  AND token = 'Uy4f0nh9Ex7HnULMDVdTdyArbsts7XLbXWKzX1IDu9Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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