Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '868a3a87bb037dc452febd4decce011a040270d9a551626906b933088ad526ef' 
  AND token = 'epp4adi/wGX8cW8cAC57dBp1DR9LKj9zG7ELOKUesPM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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