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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb30890a7e6e179de4e55d00a048982c1e6ccc7109acb904e6de421548e35bd0' 
  AND token = 'Ei8JknFhK2w8eGxv4hOHEVu+mNoYesFZzvVvR9JZV+Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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