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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '65a2f32102ef1bb55c92720cd25bae4e2f209976af67e793113d9d7f52977d3e' 
  AND token = '2MCSJAz32gi95ESuKPzEZ4E3aRW83w+sRyloBUXySyg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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