SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3c12cea1e824b4553a820affa1ab59381205eb66309da3da2ddfce27e18b354b' 
  AND token = 'ebiZYFJAcEsCSZlVWbvqv5q5CeIjPbthghGLluovDoQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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