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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b30c2c68c075f3257e84adc7b4fea3d7b5672e59dae2fc9fb2fb623422bb559' 
  AND token = 'FXHc76pN6VJkntqyBZIibMAak0wkS7y66LKY4cSImaM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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