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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0eedf4baabf115d4134d1c0cc9e41dd3917bfd2a2819cb5c19cb5568ba925acc' 
  AND token = 'ty0nlYHg5Se8aPpt97R+c8Zmy6B/gAqtb3FqfeFlBDc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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