Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '84a3a3ec3b9c7b3042dc326de833177c1873b009674080caa47a28710a0e1972' 
  AND token = 'spjxEqZLDQMgWphH9t4wkVptpffcWW0cRQi4WU2LBfc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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