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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3314e7f13b7f5ad0e216fe20041a977254748aa0e32025c2363ac698e54a8a0' 
  AND token = 'Pfd4isztPUypyk6z7ZqWGkJF4CkrV6usjvW4GEP5tPI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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