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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32d176e9ce9fc14fb6a50fe89acaa44e3e0e6f9719a13f5230fb0afcf96d7a19' 
  AND token = '3rlS9SHWuwhImWgAiB5ysR7XM4hhWL566eW9AaBBb+Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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