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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '058869d2cb89b1fa2a1384bab4f586961e0dc6856b79aa7a5c1c67cf682f29fe' 
  AND token = 'zwvs2wtpjoeD3R+6B6JCbDuL54k9eMtPOnxuaY9dAmw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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