Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0ea88489772a5978753c977a29d3aac6e3e3f46e228b29aa2195c3b2669c252' 
  AND token = 'LKxddqFPUfZRv6pdnT/HUQe2HpiBkhctDMZwFmy3zxk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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