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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8fc57e0bda261c127eba59e14501a5643467d3b08375a35c318febb3bf28329f' 
  AND token = 'RhySaSNw1K/vICf0kmbtSy7RYE9yrzaMQJ8JWosP7FM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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