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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b3c03b8cd9cab2cea7f9d83299d2e0397d264a9e9ab263ff56d24b480428ebc' 
  AND token = 'tQDhjOHZ6YCCTOjL5u6jhABbN9er1nB1hvFT8dwt5Qk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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