Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23d0feb8b668e498ffdac266cc38d61ae4118f68effa10b68f3cd44adc9b4650' 
  AND token = 'AAj49koelN/vg0pzBvYrJkjh+WS823k/af4vbk1QKiI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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