Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fbeaaaa51cc2179b1387a2c02d014613edc11f5e2a91dd251e92a7f191ebcd6e' 
  AND token = 'd9HssvhoLccoQu2mbAXRVupeI/mZAiGs/6oEPHXW1oo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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