Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fca551bf9ebb129649deebbf20fd2487d204fc75dfbe0364f621f1f41de6b833' 
  AND token = 'dg81Q14OSWolDJJbkik9q8J5cJ6hMTXJ6sP+zuQiCQQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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