Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06f90aa0022e83c8b75cfa65db97fce733aec0fdecc1c32f6bb31b039a11c2b9' 
  AND token = '6qBiFIJuTBIRf/ZNYGNGfJV/+Kmu07fYfV3pUoiMQTM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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