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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3d36b466e6cfd07c7790d49ee575f24b6e501f63bea6352c8f01bc17cf58ee01' 
  AND token = '+H69Meduvnyfl/dqHA2mYsftyDp5eaOuHJEpmgtgi20=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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