Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1a1f6131148b12848adc438ad372ee7cc9211438f24c1f40645dca2198a253f' 
  AND token = '9CUxcZvsZxyB9eG7Id/uDAscdD3cpPtbO9+j5eQJdbk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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