SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12184e4e2de1c10f5ffc2c0cab320ad76c5a1a0f0633a64eb67ae055898b705f' 
  AND token = 'jw9daDwyngh3R6XP/t9JZjBizq3k7kLZvhzUtFK/SFc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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