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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8b269bde176a2f5dbe69e3ccaa2ff5f9ae75ef8b92fcc4dc520b441ea1aabf8' 
  AND token = 'a1nHbuAG4Tl863DwZw3PbDN5mDCeHIwMAthNlxs4eIw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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