Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f197647bfe8e915d65fec2934a8ec72b18309fbd89d9a2b301e62cf370b3e395' 
  AND token = 'e1FI58ENeRufNFsKmZO3OoEvPq9t/9K/v1U+Av77Zt4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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