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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '440f2dd96d2f4ade092167449e8ba12e2583705d01f18ab4dd142b866129fa8a' 
  AND token = 'pK9aTWsdhKxZisUr/1bEnLM0gkwCp1J4P91gmMivyUA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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