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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92d8e65940cd1f416c6f5a58091b59857a5cab52e0fcb12c8fa54c7ddd16b740' 
  AND token = 'v1ZR1NRObfRF/14lm97xjCslKqowfn3ozLR6aTZnbAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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