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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09a3329e2c31b9d1ff6dad97d98c093761906056bf38d693c58690f75e1c7b0b' 
  AND token = 'MsMX/M+EbGF7LCLoUgZyQmK/RNb370/YTkxk5nMvkxs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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