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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a614272f9ea62c22ab3b59ff775858ef812ff6ab8eb9b105088a5e44d4528419' 
  AND token = 'wtXpA7PGAG3UG4l6BExDvODOiX4uTw1A7D5QQTfDkXs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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