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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b27d580ba58fab3fba64913fd6ee329a167c614f1d81a6140c98c25ef8aa38b' 
  AND token = 'G0mzN1NL8rQlbbE3tnaYx8oausrPGmTXs6jS6cCQs+k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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