Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '349e671ab9a5196384e55c06aa38a1acf0635f88e5f4d0f0a925ad97b9054893' 
  AND token = 'zEHoketKlABvtiidRVP+/X134F3TwrzdZvX1LOP3Lhc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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