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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b66fe16f96d9c3282e24fc05f0d7979853f180eac8b99f61e23a44e6ca4c8d02' 
  AND token = 'ETiI8lT+qNtdICXYkkO89qKfa2ozVwauwT6KAlaE6CA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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