Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '525d010928a60523e44419308408a36028899c55f1c2436e4d5aa2b7d531df00' 
  AND token = 'nwDVsX916isoIK9JKOvxLiMJKelKEXPEs+pX6nzSe00=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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