Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ba05ac9d71f86f12f130293677fc65dc1ae7db7f15df2937c45575e5bfe2eb7' 
  AND token = 'QDSCJlwmdP8G/yi+NTBYsL2tPGQRni3ygk738hI2wDA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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