SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7b01ccc85c2e95a30cf87cf312475dc2a984e08cb9a4d6aecbd4a2f15e8cd3f6' 
  AND token = 'R1pGvqnCYg27V3EiKrAllD4nTVU4qJSRgbls0I+GRKo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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