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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1ed3ab89e0df506792819fc9fe0df67365b51c68f7474f294e9348c01734fedd' 
  AND token = 'bm6QdcpX8bYxW2GjyWbfWJEAwYtYXKx0ptnA5xJQJq4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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