Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ec18805e20831f51a0513fa973a992219846f60f431739bb81a3f1f9ca693c1' 
  AND token = 'IWuLbYHxduzUSRm5nxj3PIBDmU8DETukbqnR2Khi62o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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