SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '033b62d7c143d261a975caf58743bc85070c45440cf863985370f91fb6f798b1' 
  AND token = 'olkSX2bXDEKZoHKFNCoGAG8HMTHPAD3CRmIsz8v+2f4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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