Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f26c47cb7748cd6cbd084edb1374dd8f9882904ae0743f5ffe2861f73099d8b3' 
  AND token = 'W20TqHoH8DB0oIyZ87/Ia6wKizqSSSn0fq2tqiEItVk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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