Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '51acc10d160c8e4832d55492a48ec2ed0470e20755b4a1f86f213268e2e89abf' 
  AND token = 'Q/+a4B2uftPyvVpLCn9ieZ3ah8le3VV3TAG6N0w25a8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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