Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01236d6be9531ee1f9d122eac8cf58388a2c4672551775d057a4686cbda0c44a' 
  AND token = 'DcP+dg64hjo92CxMwoz2dzEhoXDUs1kc2R/Jlo3/EW4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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