SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '98fca8079b29e7ca1a582bc809ff3382e70b69890bdc66dc9829a82d815af42b' 
  AND token = 'zWD6sevBB+qY4mkXSeg2V6YSgPdh4Km5dEtA58GLoxk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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