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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '865bc8413c6e8aeb1722fa7ae6ecfed5514a1b9d3eda2a047d81e8786526222a' 
  AND token = 'ROcoaEH6OsG4l3VWnjdnTqCUhYPUiWmnndafFU4f2Yc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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