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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33312e93c6fba3ecd6e6cbd25385eb818a7e93655800869e27a97b3262ba8708' 
  AND token = 'Fzt1pc8WH9LiZOxf+r+uKFKeKogBJWosfGtRIlvHazU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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