SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32847e6d433d62ba756c847ef65dd31fafc11d96875830f4523cf5628705a014' 
  AND token = '+xcyJJUiengwZermQwzH0RSXyuvgskLy8Ph7JQPG3mY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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