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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '85e63a1eda8acec37070c7a551d8c618845de775bba1f2321f027ba13fe49831' 
  AND token = 'Y4iz4BXf89yxbxsk4RV+P6vnvNeuB35NZFlWeV+w+pU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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