Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5432f6e1e55ba4d7d2e64ea570f01de0d89225f9f54bc588522fa3c5c2893da' 
  AND token = 'SXMUHMcpEZ0UNvs61g0F+fN3+UXUF2XGqpUDi+1YQOo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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