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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f2b631beed529e44825d349dc7ac300e0cdd2a767607c73a6a9ae61b143937b' 
  AND token = 'Iu0Pm8cT14dluJzGeDhCFgLJ2PPfLaH4/yR6y0ZL9GI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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